Huawei Quidway S3000 Series User Manual

Operation Manual - STP
Quidway S3000 Series Ethernet Switches Chapter 1 RSTP Configuration
1-2
Switch A
Switch C
Switch B
CP2
BP2
CP1
BP1
AP2AP1
LAN
Figure1-1 Designated switch and designated port
For a switch, the designated switch is a switch in charge of forwarding packets to the
local switch via a port called the designated port accordingly. For a LAN, the designated
switch is a switch that in charge of forwarding packets to the network segment via a port
called the designated port accordingly. As illustrated in the figure1-1, Switch A forwards
data to Switch B via the port AP1. So to Switch B, the designated switch is Switch A and
the designated port is AP1. Also in the figure above, Switch B and Switch C are
connected to the LAN and Switch B forwards packets to LAN. So the designated switch
of LAN is Switch B and the designated port is BP2.
 Note:
AP1, AP2, BP1, BP2, CP1 and CP2 respectively delegate the ports of Switch A, Switch B and Switch C.
z The specific calculation process of STP algorithm.
The following example illustrates the calculation process of STP.
The figure1-2 below illustrates the network.

Huawei Quidway S3000 Series Specifications

General

Brand	Huawei
Model	Quidway S3000 Series
Category	Switch
Language	English